cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A088994 Number of permutations in the symmetric group S_n such that the size of their centralizer is odd.

Table of values

n a(n)
0 1
1 1
2 0
3 2
4 8
5 24
6 144
7 720
8 8448
9 64512
10 576000
11 5529600
12 74972160
13 887546880
14 11285084160
15 168318259200
16 2843121254400
17 44790578380800
18 747955947110400
19 13937735643955200
20 287117441217331200
21 5838778006909747200
22 120976472421826560000
23 2712639152754878054400

List of values

[1, 1, 0, 2, 8, 24, 144, 720, 8448, 64512, 576000, 5529600, 74972160, 887546880, 11285084160, 168318259200, 2843121254400, 44790578380800, 747955947110400, 13937735643955200, 287117441217331200, 5838778006909747200, 120976472421826560000, 2712639152754878054400]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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